[oolua] Re: Saving OOLua State
- From: "Liam Devine" <liamdevine@xxxxxxxxx>
- To: oolua@xxxxxxxxxxxxx
- Date: Mon, 28 Oct 2013 11:11:22 -0000
On 28/10/13 05:44, apscience wrote:
Hello again,
As part of the project I’m working on I want to be able to stop, save
the program state, and then load it at another time. Saving the program
state includes the Lua state.
However with OOLua I’m a little stumped on how to do this. Saving the
C++ objects themselves is easy enough. I can save the Lua state using
eris [1].
. My other thought would be to only
share a string id of objects with lua and then export c++ functions with
OOLua as static functions which take the string id and then look up the
correct c++ object. However that sounds like I’m remaking a lot of
OOLua’s functionality there (like inheritance/type safety/etc.)
Any thoughts would be appreciated. Thank you again for the help you’ve
already provided.
[1] https://github.com/fnuecke/eris
Sound interesting, I would be pleased if you kept me informed of your
progress on this matter.
> However I’m not sure how I’d re-link the lua objects to the
> C++ objects after loading the state
OOLua keeps a table of the mappings between class pointers and Lua
userdata pointers that is stored in the registry which maybe of
interest. See [1], although it is possible for there to be multiple
entries in this table that point to the same userdata, this is due to
offsets off pointers in class hierarchy.
[1]
https://bitbucket.org/liamdevine/oolua/src/c9c4510f48ed5c2de4c64c79c0cedae8c5440442/include/proxy_storage.h?at=OOLua-2
--
Liam
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